Furnace fire-door.



J. R. FORTUNE.

FURNACE FIRE DOOR.

APPLICATION FILED MAR. 25, 1908.

Patented Nov. 16, 1909.

IN VBN TOR WITNESSES:

A TTORNE Y6 JOHN R. FORTUNE, OF DETROIT, MICHIGAN.

FURNACE FIRE-DOOR.

Specification of Letters Patent.

Patented Nov. 16, 1909..

Application filed March 25. 1908. Serial No. 423,080.

To all whom it ma y concern:

Be it kiiown that I, dorm R. Fon'rUNn, acitizen of the l nited States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in F urnace Fire-Doors, of which the following is a specification, reference being had therein to 'hc accompanying drawings.

This invention relates to improvements in furnace fire-doors and its object is to provide a door front with a suitable cast metal pro Looting lining, said lining and door front being so constructed as to prevent the lining from becoming burned out, and further to so attach the lining to the door front that the lining will be prevented from warping, and so that it may be quickly and easily detached.

A further object is to provide a door front with a detachable lugor handle so that if the handle becomes broken it may be quickly replaced.

To this end the invention consists in so constructing the door front and lining that currents of cold air will be directed over the whole inner surface of the lining, and in attaching the lining to the door front by a single longitudinal bolt which permits free expansion and contraction of the lining in all directions.

The invention also consists in making the handle a separate piece which is attached to the door front by the same bolt which holds the lining in place, and in the several advantages of the particular construction, arrangement and combination of parts all as hereinafter more fully described, reference being bad to the accompanying drawings in Which Figure 1 is a front elevation of a furnace tire-door embodying the invention, with parts broken away to show the construction, Fig. 2 is a vertical section of the same on the line mm of Fig. 1; Fig. 3, a. l'lOI'lzontal section on the line y-y; and Fig. 1, a similar section -on the line 2+2.

As shown in the drawings 1 is a fire-door front of the usual concavo-convex form having an inwardly extending edge flan e 2 seating upon the door frame 3 or raise rib around the door opening in the furnace fronts, Lugs 4 on the furnace front, and ears 5;;. formed integral with the door front,

face of the door front and forming between them a series of separate air passages between the door front and lining. The lining is also provided with a ccntral lug 9 at each end having an opening to receive a bolt 10 which passes through openings 'in the end flanges 2 and detachably holds the lining in place. The lining is of less width and height than the internal dimensions of the door front so that there is a space between the lining and door all around its edges to permit its free expansion and a longitudinal rib or thickened portion 11 on the door front between the lugs 9 centers the lining on the bolt 10.

A rib 12 on the lining extends longit-udinally of the bolt and outward into engagement with its inner side, and the rib 11 on the door front extends inward into engagement with the outer side of the bolt, thus separating the air ducts or passages formed by the vertical ribs on the upper half of the lining from those on the lower half of the same. Two longitudinal rows of openings 13 are provided in the door front, one just above and the other just below the bolt 10, and so arranged that each opening ilt'ln'llis tlll to the inner ends of two of the passages. The air is drawn in through the openings and passing along the passages, enters the furnace around the upper and lower edges of, the lining, as shown by the arrows in Fig. 9, cooling the whole surface of the door and lining. The ribs 8 not only space the lining from the door front and form air passages between,-

but they also tend to prevent the lining from warping and increase the radiating surface of said lining. A central opening 14 in the door front coincides-with the inner end of a flaring opening 15 in the lining so that the operator may view the interior of the furnace without opening the door.

A notch 16 18 provided in the front edge of the door front and into this notch fits a casting 17 provided with a curved lug 18 forming the door handle. The casting is securely held in place by the bolt 10 which independent vertical passages each open at its opposite end.

said openings extendingtransverse] y to the parallel'ribs and dividing the air. passages provided with a row casing to hold the door to receive air through said opening and disand a rib extending transversely to said ribs "and forming end walls'for the adapted to communicate with the interior of i in the door -a series'of vertical ribs on the lining extend-M passes thereti'irough, a re ess vided in its outer side to receive the head of the bolt, and said casting forms a projection on the door front; to engage a lug 20 on the clo ed.

llaring thus fully described my invention what -I claim is:-.

1..ihe combimition' of a door front having a series of openings, a'lining secured to the door front and formed with a series of having an end wall adjacent to one of the openings in the door frtmtamlcacli passage adapted charge it at its opposite end.

2. lhe comtmiationof a door front having aseries ,ol: openings, :1. linlng spaced from the door front and secured thereto, a series of ribs on the lining forming air passages between the door front and lining,

passages, said passages. each communicating with the atmosphere through one ofthe openings, in the door adjacent to said transverse rib and a furnace at its opposite end. I

-5. The combination of a door front having one or more holes along its longitudinal center line, a lining secured to the door front andv formed with air passages in its surface adja- :ent to the door front, said passages extending m opposite directions fromsald center line of the door front and each communicating \Vlill the atmosphere at its inner end through said holes in the door front and 4. The combiinition-of a door front havtudinal center line, a lining, parallel ribs 011 the lining forming air passages between the lln'ing and doonironhand a rib ad acent to formed by 'said ribs into air passages extending i n opposite directions from said transverse rib, said' passages communicating withthe atmosphere through said openings front and open at. their ends at the edges ofsaid lining.

I). Qlhe combination of a door front having inwardlyextending flanged edges and j of openings at each side ofits lrmgitudinal center line, ajlining attached tothe door front with a space'between it and the door front and between its upper and lower edges and the flanged edges of the door front, a longitudinal rib on the lining extending tou'ardtlu: inner surface of the door front between its rows of openings,

ing upwardly and downwardly from the lon itudinal rib and formin air assa 'es and means for securing the lining to .the

being prot inner surface of lending throughsaid east-il'ig and flange. nuiacross the inner surface of the front para therewith between said surfacehnd thelining, lugs on tlu'i-lining engaged bysaid bolt,"

door front.-

ing inwardly extending flanged edges rovided with openings, a lining spaced rom the inner surface of the door front, a bolt extending through said openings in said flanged edges and across the inner surface of the door tween said surface and the adjacent side of the lining,

and lugs on the lining engaged by said bolt to detachably secure the lin ng to the front. t v

8. The combination of a door front having inwardly extending flanged edges, a lining spaced. from said flanged ed es, lugs on the lining, a bolt extending t rough the flanged edges and through thelugs to secure the lining to the front, and'a. projection on the door front to center the lining on the bolt relative to said front. v i

t), The combination of a door front having a series of openings and provided with inwardly extending flanged edges, :1. lining spaced froni the door front and from its flanged edges, parallel ribs on the lining extending across the space between the front and lining, lugs on the lining, a bolt extend- .ing through the flanged edges and through openlngs in the lugs to secure-thelining to the front, a projecting rib on the door'front extending inward between said lugs, and a rib on the lining extending across the same between said lugs and outward toward the rib on the front.

l0.- A furnace fire door comprising afronthaving inwardly extending flanged edges having an o1'iening,'-a lining incloscd within said flanged; edges, a castlng formed with auopening and a projecting portion forming a handle, the openin is in engaging the linmgto handle tothe front.

'11.. A furnace fire doorcomprising a door and a bolt extending through the casting and flange and secure the lining and front having inwardly extending flanged formedlwith a projection e,- a' lnnng spaced from the" edges, a castin forming a hand the door front," a bolt-cit to engage the ing inwardly extending flanges and pro front parallel therewith and be-- l'lel opposite end of said from, lugs on said lining,

esdsee 3 vided with a notch in one engaging said notoh projection forming a cess in theouter side,

flange, a casting end of the bolt engaging the outer side of and provlded With a the flange handle and with a rei In testimony whereof I afiix my signature e lining upon the door I in presence of two Witnesses.

a bolt -provided JOHN R. FORTUNE.

with a head engaging the recess in the cast- Witnesses: ing and extending through said casting, OTTO F, BARTHEL, flanges, and lugs, and a nut on the opposite A. M. Does. 

